Using NearestGraph QoS Prediction Method for Service Recommendation in the Cloud

Table 2

Performance comparisons.

Matrix	Metrics	Response-Time (seconds)
Density(%)		UMean	IMean	UPCC	IPCC	WSRec	NearestGraph
10	MAE	0.8785	0.7015	0.6761	0.6897	0.6679	0.6643
	RMSE	1.8591	1.5813	1.4078	1.4296	1.4053	1.4027
20	MAE	0.8768	0.6867	0.5517	0.5917	0.5431	0.5104
	RMSE	1.8548	1.5342	1.3151	1.3268	1.2986	1.2785
30	MAE	0.8747	0.6818	0.5159	0.5037	0.4927	0.4723
	RMSE	1.8557	1.5311	1.2680	1.2252	1.1973	1.1246
Matrix	Metrics	Throughput(kbps)
Density(%)		UMean	IMean	UPCC	IPCC	WSRec	NearestGraph
10	MAE	54.0084	29.2651	26.1230	29.2651	24.3285	24.3269
	RMSE	110.2821	66.6334	63.9573	64.2285	64.1908	63.5435
20	MAE	53.6768	27.3393	24.2695	26.8318	22.7717	21.7493
	RMSE	110.2977	64.3986	54.4783	60.0825	54.3701	52.8731
30	MAE	53.8792	26.6239	23.7455	26.4319	21.3194	19.6530
	RMSE	110.1751	64.3986	54.4783	57.8593	51.7768	50.5765